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Author Topic: Tamron 24-70 Focus Accuracy  (Read 1834 times)

brianleighty

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Tamron 24-70 Focus Accuracy
« on: September 21, 2012, 11:26:00 PM »
So just thought I'd share some findings that happily surprised me today. I have a wedding this Sunday and decided to to rent the Tamron 24-70. As always I setup Focal to calibrate AFMA all the rented lenses. I was surprised when it came time for the Tamron that it's focus accuracy was right around what I get with Canon's L zooms. The only other Tamron lens I've owned is the Tamron 17-50 which while a great lens has fairly large focus accuracy issues. For this reason I often use it at f/4. It also sharpens up nicely I've noticed vs 2.8. Anyways, attached are the Focal reports for both lenses on my 50D and the 24-70 on my 5D. We'll see how well it does Sunday but this definitely gives me a little more assurance than before.
Canon 5D Mark II, 50D, XSi, 24-105L IS, Sigma 35 1.4, Canon 40 2.8, Canon 35 2.0, Sigma 10-20, Tamron 17-50, Canon 50 1.8, 580 EXII, 430 EXII

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Tamron 24-70 Focus Accuracy
« on: September 21, 2012, 11:26:00 PM »

dirtcastle

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Re: Tamron 24-70 Focus Accuracy
« Reply #1 on: September 22, 2012, 12:53:29 AM »
That's great to hear. Seems like focus is what often separates great lenses from would-be lenses (something which seems to afflict a disproportionate number of Sigma and Tamron lenses).

That said, it seems reasonable to expect that a recently released $1300 lens would have good AF, right??

brianleighty

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Re: Tamron 24-70 Focus Accuracy
« Reply #2 on: September 22, 2012, 08:29:18 AM »
That's great to hear. Seems like focus is what often separates great lenses from would-be lenses (something which seems to afflict a disproportionate number of Sigma and Tamron lenses).

That said, it seems reasonable to expect that a recently released $1300 lens would have good AF, right??
Very true. Never the less... That doesn't mean it's GOING to have it. This test gives me a little more confidence that with more money, Tamron can make a much better AF system.
Canon 5D Mark II, 50D, XSi, 24-105L IS, Sigma 35 1.4, Canon 40 2.8, Canon 35 2.0, Sigma 10-20, Tamron 17-50, Canon 50 1.8, 580 EXII, 430 EXII

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Re: Tamron 24-70 Focus Accuracy
« Reply #2 on: September 22, 2012, 08:29:18 AM »